Flue radiator



Aug. 4, 1936- H. M. PETZOLD ET AL FLUE RADIATOR Filed Jan.

' FIG. 1.

FIG. 2.

INVENTORS.

s in .LD N Q W Z w T A EN 5% M 5 mm r an Patented Aug. 4, 1936 FLUERADIATOR Harold M. Petzold and Norman N. Norton, Portland, Oreg.

Application January 14, 1936, Serial No. 59.136

3 Claims.

This invention relates to improvements in flue radiators and animportant object is to provide a radiator adapted to be connected to thestovepipe or flue at a point intermediate the furnace 5 and chimney andwhich will save fuel by preventing the passage of heat from the stove orfurnace to and out of the chimney; 1

Another object of the invention is to provide a flue radiator which willremove soot from the smoke and allow only relatively clean, light smoketo pass into the chimney flue, thereby greatly reducing the danger ofchimney fires. V

A further object of the invention is to provide a flue radiatorconstruction which will obviate 15 the use of a smoke pipe damper andwhich will permit the heating system to produce a more uniform heat.

A still further object is to provide a flue radiator having adjustingmeans whereby the radiator 2 may be adapted to the various styles andsizes of furnaces, chimneys and fuels.

Another important object of the invention is to provide a flue radiatorparticularly adapted for use in the basement and which will also elimi-2'5 nate cold floors above the basement.

Other important objects are to provide a flue radiator of strictlyfireproof construction, to provide a radiator which may easily becleaned, to provide a flue radiator having adjusting means so 30constructed that the flue will always remain open to permit the escapeof smoke and gases through the chimney and which adjusting means may notbe accidentally actuated to entirely close off the flue leading to thechimney.

35 Other objects and advantages will be apparent during the course ofthe following detailed description taken in connection with theaccompanying drawing and in which drawing:

Figure 1 is a view partly in side elevation and 40 partly in verticalsection showing the application of the improved flue radiator to a flueconnecting a furnace to its chimney.

Figure 2 is a vertical sectional view of the improved flue radiator. V

45 Figure 3 is a sectional view looking upwardly as shown by the line 33of Figure 2.

In the drawing, wherein for the purpose of illustration is shown only apreferred embodiment of the invention and wherein similar refer- 50 oncecharacters denote the same parts throughout the several views, theletter A may generally designate the improved flue radiator which may beconnected into the flue at a point intermediate the furnace B and thechimney C.

55 Referring to the flue radiator A, it may comcated pipe 26.

prise a smoke chamber it) formed by an upright hollow cylindricalmetallic drum H and provided with an inlet l2, an outlet 83 and acleanout door M. The inlet i2 is preferably located in the upper portionof the cylindrical wall E5 of the 5' drum and it may if desired beprovided with a cylindrical flange l6 to facilitate connection of thedrum to the flue il leading from the furnace B. As for the outlet l3, itmay comprise a stationary cylindrical pipe l8 intersecting the top 10horizontal wall l9 of the drum and preferably remote from the inlet l2.This stationary pipe l8 may be secured to the top wall id as by weldingor it may be cast or otherwise formed integral with the drum. The lowerend of the pipe l8 5 may project downwardly from the top wall 99 intothe smoke chamber and terminate approximately halfway between the topand bottom walls of the drum while'the upper end of the pipe may projectabove the top wallsufiicient to form a fastening 2o flange 26 to whichone arm 22 of the curved elbow 23 may be connected, the other arm 2 ofthe elbow being connected to the chimney'C as by a horizontal flue 25 ofsuitable dimensions.

Telescopically mounted within the stationary 25 pipe 68 is a verticallyand circumferentially adjustable pipe 25, the lower open end 21? ofwhich .may be obliquely truncated in a plane approximately 35 to thehorizontal. Secured to opposite interior sides of the upper portion ofthis adjustable pipe 26 as by countersunk rivets 28 is an invertedU-shaped supporting strap 29 provided with an aperture intermediate itsends for receiving the threaded lower end of a supporting rod 30. A pairof stop nuts 3i on opposite sides of the strap may serve to adjustablysecure the supporting rod to the strap. This support ing rod may extendvertically upward axially of the stationary pipe and pass obliquelythrough the curved surface of the elbow 23. Exteriorly of the elbow itmay be encircled by a suitable sleeve 32 provided with a truncated lowerface 33 in a plane tangent to the exterior surface of the elbow on whichthis sleeve is adapted to bear. The sleeve 32 is provided with a setscrew 34 whereby the supporting rod 30 may be held in any desiredvertically or circumferentially ad- J'usted position. At a point abovethe sleeve the supporting rod may be bent at a right angle to form ahandle 35 and the position of this handle may serve to indicate thedegree of vertical and circumferential adjustment of the obliquely trun-The supporting rod 30 may be of a length just sufficient to permitlowering of the adjustable pipe 26 into contact with the bottom Wall ofthe drum. The furnace B and chimney C may vary in construction fromthose illustrated in the accompanying drawing.

When a fire is lighted in the furnace B, the smoke generated thereinwill pass through the pipe I6 and will enter the upper portion of thesmoke chamber in a heated condition. drum will absorb the heat from thesmoke and radiate it upwardly and outwardly, as shown diagrammaticallyby the arrows in Figure 1, not only circulating the heat throughout thebasement but also warming the floor above the basement. The cooled smokewill gradually sink towards the bottom of the smoke chamber as showndiagrammatically by the arrows in Figure 2, thereby displacing the airin the bottom of the drum and causing the same to pass upwardly throughthe pipes 26 and Hi, the elbow 23, the flue 25 and the chimney C. Thesmoke will continue to pass into and out of the drum on ac count of thenatural draft of the chimney and also because of the draft created inthe drum by the difference in temperature between the top and bottomthereof.

The height of the adjustable pipe 26 may be regulated to a positionconsidered by the janitor or fireman to be the most satisfactory for thetype of furnace and fuel utilized, it being recognized that thesefactors greatly influence the gravity or density of the smoke generatedin the furnace. The adjustment may easily be made by means of thesupporting rod 30 and the set screw 34. It will be noted that theadjustable pipe may be temporarily lifted and turned as for looseningand removing soot therefrom and from the interior of the stationary pipe98 without releasing the set screw 34 and when subsequently lowered thepipe will return to its previous vertical and circumferential positiondue to the coaction between the obliquely truncated sleeve 32 and thecurved exterior surface of the elbow 23. The obliquely truncated openlower end of the adjustable pipe 26 increases the effective area of thepipe opening, thereby increasing the suction of the adjustable pipe.Moreover, when the adjustable pipe is lowered into contact with thebottom wall of the drum, the

The

eifective area thereof will not be materially reduced, due to theoblique truncation of its lower end.

A large proportion of the soot contained in the smoke will deposit onthe bottom of the smoke chamber while the smoke is cooling and settlingtherein and this may be periodically removed through the clean-out doorM.

The slow settling motion of the cooling smoke in the smoke chamber willact to check any excessive chimney draft and the adjustable pipe 26 maybe regulated to further check the draft if found desirable, therebyrendering the use .of a smoke pipe damper unnecessary.

Various changes in the shape, size, and arrangements of parts may bemade to the form of invention herein shown and described, withoutdeparting from the spirit of the invention or the scope of the claims.

We claim:

1. A flue radiator comprising a smoke chamber having inlet and outletopenings, one of which includes a vertically and circumferentiallyadjustable pipe, said pipe having an obliquely truncated lower end.

2. A flue radiator comprising a smoke chamber having inlet and outletopenings in the upper p rtion thereof, at least one of which is providedwith a vertically and circumferentially adjustable pipe adapted toextend to the bottom of the chamber, said pipe having an obliquelytruncated lower end.

3. In a device of the class described, the-combination with a stationaryvertical pipe, of a curved elbow having an arm connected to the upperend of the stationary pipe, a movable pipe telescopically slidable withrespect to the stationary pipe, a rod secured to the movable pipe andobliquely extending through the curved elbow, a sleeve encircling saidrod exteriorly of the elbow, said sleeve having an end face bearingagainst the exterior of the curved elbow, said end face beingsubstantially tangent to the curved exterior of the elbow, and meansreleasably securing the rod against movement with respect to the sleeve.

HAROLD M. PETZOLD. NORMAN N. NORTON.

